About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-Grained and Heterostructured Materials (UFGH) XIV
|
| Presentation Title |
Chemical patterning to enable new property combinations in multicomponent nanocrystalline alloys |
| Author(s) |
Timothy J. Rupert |
| On-Site Speaker (Planned) |
Timothy J. Rupert |
| Abstract Scope |
Nanocrystalline metals have unique deformation mechanisms, with the importance of grain boundaries being amplified. In this talk, we explore the usage of chemical patterning to enable improved properties in multicomponent nanocrystalline alloys. First, synergistic lattice and grain boundary segregation are used for extreme strengthening. Doping of the lattice can strengthen through stiffening and swelling contributions, while grain boundary doping improves strength by reducing grain boundary energy. These effects are additive, yet also lead to unexpected strength-scaling. In addition, grain boundary segregation can induce complexion transitions that are beneficial for toughening, with these features altering failure mode at both room and elevated temperatures. We show the first evidence of elevated temperature plasticity where the complexions themselves directly flow, resulting in pronounced surface evolution of microscale samples. As a whole, this talk will demonstrate that thoughtful alloying of chemical complex nanocrystalline alloys can be used to target improved performance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Nanotechnology, Characterization |